SF Series Low-noise Axial Fan [1] [2] [3] 　　SF series axial ventilator can be used for air-exchanging of ventilation forced heating radiation in the places of metallurgy, chemical, light industry, foodstuff, medical departments, as well as domestic buildings. If takes off the case of the machine, can be use as common fan, in addition in order to promote the wind pressure in the pipe-line they are can be series installed in the long pipe and conduit line. 　　The SF series are divided into as wall type, position type ( supporting feet type, fixed type, rotation type ) and conduit type according to the using requirements. 　　This series is characterized with the merits of simple structure, stable and reliable, low noise, wide range for function selection. Type Model and machina No. Rated rotation speed (r/min) Blow rate m3/h Full pressure pa Power of motor kw Noise dB dB(A) Wall type axial ventilator SFB2.5-4/4R 1450 1000 35 0.09 59 SFB3-4/4R 1450 2000 59 0.15 61 SFB4-4/4R 1450 5870 149 0.37 72 SFB4-6 960 4500 80 0.25 64 SFB5-4/4R 1450 10000 170 0.75 74 SFB5-6 960 7700 120 0.37 66 SFB6-4 1450 18700 300 2.2 80 SFB6-6 960 14500 170 1.1 75 SFB7-6 960 20250 224 2.2 80 SFB7-4 1450 24500 350 3 85